/**
 * @author zjh
 */
+function($) {
	"use strict";

	// TOOLTIP PUBLIC CLASS DEFINITION
	// ===============================

	/**
	 * 原生的Bootstrap工具提示框
	 * @class Tooltip
	 * @constructor
	 * @example
	 * 	js代码
	 * 	$(function(){
	        $('[data-toggle="tooltip"]').tooltip();
	    });
	    
	    <button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="left" title="Tooltip on left">
	    	左边弹出提示框
	    </button>
	 */
	var Tooltip = function(element, options) {
		this.type = this.options = this.enabled = this.timeout = this.hoverState = this.$element = null

		this.init('tooltip', element, options)
	}

	Tooltip.DEFAULTS = {
		animation : true,
		/**
		 * 弹出框位置
		 * @property placement
		 * @type {String}(top/bottom/left/right/auto)
		 * @default 'top'
		 */
		placement : 'top',
		selector : false,
		template : '<div class="tooltip"><div class="tooltip-arrow"></div><div class="tooltip-inner"></div></div>',
		/**
		 * 触发弹出框的事件
		 * @property trigger
		 * @type {String}(click/hover/focus/manual)，可组合
		 * @default 'hover focus'
		 */
		trigger : 'hover focus',
		/**
		 * 弹出框内容
		 * @property title
		 * @type {String}
		 * @default ''
		 */
		title : '',
		/**
		 * 弹出框的动画时间
		 * @property delay
		 * @type {Integer} 或 {Object}(delay: { show: 500, hide: 100 })
		 * @default 0
		 */
		delay : 0,
		html : false,
		/**
		 * 弹出框的父容器
		 * @property container
		 * @type string | false
		 * @default false
		 */
		container : false
	}

	Tooltip.prototype.init = function(type, element, options) {
		this.enabled = true
		this.type = type
		this.$element = $(element)
		this.options = this.getOptions(options)

		var triggers = this.options.trigger.split(' ')

		for (var i = triggers.length; i--;) {
			var trigger = triggers[i]

			if (trigger == 'click') {
				this.$element.on('click.' + this.type, this.options.selector, $
						.proxy(this.toggle, this))
			} else if (trigger != 'manual') {
				var eventIn = trigger == 'hover' ? 'mouseenter' : 'focus'
				var eventOut = trigger == 'hover' ? 'mouseleave' : 'blur'

				this.$element.on(eventIn + '.' + this.type,
						this.options.selector, $.proxy(this.enter, this))
				this.$element.on(eventOut + '.' + this.type,
						this.options.selector, $.proxy(this.leave, this))
			}
		}

		this.options.selector ? (this._options = $.extend({}, this.options, {
			trigger : 'manual',
			selector : ''
		})) : this.fixTitle()
	}

	Tooltip.prototype.getDefaults = function() {
		return Tooltip.DEFAULTS
	}

	Tooltip.prototype.getOptions = function(options) {
		options = $.extend({}, this.getDefaults(), this.$element.data(),
				options)

		if (options.delay && typeof options.delay == 'number') {
			options.delay = {
				show : options.delay,
				hide : options.delay
			}
		}

		return options
	}

	Tooltip.prototype.getDelegateOptions = function() {
		var options = {}
		var defaults = this.getDefaults()

		this._options && $.each(this._options, function(key, value) {
			if (defaults[key] != value)
				options[key] = value
		})

		return options
	}

	Tooltip.prototype.enter = function(obj) {
		var self = obj instanceof this.constructor ? obj
				: $(obj.currentTarget)[this.type](this.getDelegateOptions())
						.data('bs.' + this.type)

		clearTimeout(self.timeout)

		self.hoverState = 'in'

		if (!self.options.delay || !self.options.delay.show)
			return self.show()

		self.timeout = setTimeout(function() {
			if (self.hoverState == 'in')
				self.show()
		}, self.options.delay.show)
	}

	Tooltip.prototype.leave = function(obj) {
		var self = obj instanceof this.constructor ? obj
				: $(obj.currentTarget)[this.type](this.getDelegateOptions())
						.data('bs.' + this.type)

		clearTimeout(self.timeout)

		self.hoverState = 'out'

		if (!self.options.delay || !self.options.delay.hide)
			return self.hide()

		self.timeout = setTimeout(function() {
			if (self.hoverState == 'out')
				self.hide()
		}, self.options.delay.hide)
	}

	Tooltip.prototype.show = function() {
		var e = $.Event('show.bs.' + this.type)

		if (this.hasContent() && this.enabled) {
			this.$element.trigger(e)

			if (e.isDefaultPrevented())
				return

			

			var $tip = this.tip()

			this.setContent()

			if (this.options.animation)
				$tip.addClass('fade')

			var placement = typeof this.options.placement == 'function' ? this.options.placement
					.call(this, $tip[0], this.$element[0])
					: this.options.placement

			var autoToken = /\s?auto?\s?/i
			var autoPlace = autoToken.test(placement)
			if (autoPlace)
				placement = placement.replace(autoToken, '') || 'top'

			$tip.detach().css({
				top : 0,
				left : 0,
				display : 'block'
			}).addClass(placement)

			this.options.container ? $tip.appendTo(this.options.container)
					: $tip.insertAfter(this.$element)

			var pos = this.getPosition()
			var actualWidth = $tip[0].offsetWidth
			var actualHeight = $tip[0].offsetHeight

			if (autoPlace) {
				var $parent = this.$element.parent()

				var orgPlacement = placement
				var docScroll = document.documentElement.scrollTop
						|| document.body.scrollTop
				var parentWidth = this.options.container == 'body' ? window.innerWidth
						: $parent.outerWidth()
				var parentHeight = this.options.container == 'body' ? window.innerHeight
						: $parent.outerHeight()
				var parentLeft = this.options.container == 'body' ? 0 : $parent
						.offset().left

				placement = placement == 'bottom'
						&& pos.top + pos.height + actualHeight - docScroll > parentHeight ? 'top'
						: placement == 'top'
								&& pos.top - docScroll - actualHeight < 0 ? 'bottom'
								: placement == 'right'
										&& pos.right + actualWidth > parentWidth ? 'left'
										: placement == 'left'
												&& pos.left - actualWidth < parentLeft ? 'right'
												: placement

				$tip.removeClass(orgPlacement).addClass(placement)
			}

			var calculatedOffset = this.getCalculatedOffset(placement, pos,
					actualWidth, actualHeight)

			this.applyPlacement(calculatedOffset, placement)
			this.$element.trigger('shown.bs.' + this.type)
		}
	}

	Tooltip.prototype.applyPlacement = function(offset, placement) {
		var replace
		var $tip = this.tip()
		var width = $tip[0].offsetWidth
		var height = $tip[0].offsetHeight

		// manually read margins because getBoundingClientRect includes
		// difference
		var marginTop = parseInt($tip.css('margin-top'), 10)
		var marginLeft = parseInt($tip.css('margin-left'), 10)

		// we must check for NaN for ie 8/9
		if (isNaN(marginTop))
			marginTop = 0
		if (isNaN(marginLeft))
			marginLeft = 0

		offset.top = offset.top + marginTop
		offset.left = offset.left + marginLeft

		$tip.offset(offset).addClass('in')

		// check to see if placing tip in new offset caused the tip to resize
		// itself
		var actualWidth = $tip[0].offsetWidth
		var actualHeight = $tip[0].offsetHeight

		if (placement == 'top' && actualHeight != height) {
			replace = true
			offset.top = offset.top + height - actualHeight
		}

		if (/bottom|top/.test(placement)) {
			var delta = 0

			if (offset.left < 0) {
				delta = offset.left * -2
				offset.left = 0

				$tip.offset(offset)

				actualWidth = $tip[0].offsetWidth
				actualHeight = $tip[0].offsetHeight
			}

			this.replaceArrow(delta - width + actualWidth, actualWidth, 'left')
		} else {
			this.replaceArrow(actualHeight - height, actualHeight, 'top')
		}

		if (replace)
			$tip.offset(offset)
	}

	Tooltip.prototype.replaceArrow = function(delta, dimension, position) {
		this.arrow().css(position,
				delta ? (50 * (1 - delta / dimension) + "%") : '')
	}

	Tooltip.prototype.setContent = function() {
		var $tip = this.tip()
		var title = this.getTitle()

		$tip.find('.tooltip-inner')[this.options.html ? 'html' : 'text'](title)
		$tip.removeClass('fade in top bottom left right')
	}

	Tooltip.prototype.hide = function() {
		var that = this
		var $tip = this.tip()
		var e = $.Event('hide.bs.' + this.type)

		function complete() {
			if (that.hoverState != 'in')
				$tip.detach()
		}

		this.$element.trigger(e)

		if (e.isDefaultPrevented())
			return

		

		$tip.removeClass('in')

		$.support.transition && this.$tip.hasClass('fade') ? $tip.one(
				$.support.transition.end, complete).emulateTransitionEnd(150)
				: complete()

		this.$element.trigger('hidden.bs.' + this.type)

		return this
	}

	Tooltip.prototype.fixTitle = function() {
		var $e = this.$element
		if ($e.attr('title')
				|| typeof ($e.attr('data-original-title')) != 'string') {
			$e.attr('data-original-title', $e.attr('title') || '').attr(
					'title', '')
		}
	}

	Tooltip.prototype.hasContent = function() {
		return this.getTitle()
	}

	Tooltip.prototype.getPosition = function() {
		var el = this.$element[0]
		return $.extend({},
				(typeof el.getBoundingClientRect == 'function') ? el
						.getBoundingClientRect() : {
					width : el.offsetWidth,
					height : el.offsetHeight
				}, this.$element.offset())
	}

	Tooltip.prototype.getCalculatedOffset = function(placement, pos,
			actualWidth, actualHeight) {
		return placement == 'bottom' ? {
			top : pos.top + pos.height,
			left : pos.left + pos.width / 2 - actualWidth / 2
		} : placement == 'top' ? {
			top : pos.top - actualHeight,
			left : pos.left + pos.width / 2 - actualWidth / 2
		} : placement == 'left' ? {
			top : pos.top + pos.height / 2 - actualHeight / 2,
			left : pos.left - actualWidth
		} :
		/* placement == 'right' */{
			top : pos.top + pos.height / 2 - actualHeight / 2,
			left : pos.left + pos.width
		}
	}

	Tooltip.prototype.getTitle = function() {
		var title
		var $e = this.$element
		var o = this.options

		title = $e.attr('data-original-title')
				|| (typeof o.title == 'function' ? o.title.call($e[0])
						: o.title)

		return title
	}

	Tooltip.prototype.tip = function() {
		return this.$tip = this.$tip || $(this.options.template)
	}

	Tooltip.prototype.arrow = function() {
		return this.$arrow = this.$arrow || this.tip().find('.tooltip-arrow')
	}

	Tooltip.prototype.validate = function() {
		if (!this.$element[0].parentNode) {
			this.hide()
			this.$element = null
			this.options = null
		}
	}

	Tooltip.prototype.enable = function() {
		this.enabled = true
	}

	Tooltip.prototype.disable = function() {
		this.enabled = false
	}

	Tooltip.prototype.toggleEnabled = function() {
		this.enabled = !this.enabled
	}

	Tooltip.prototype.toggle = function(e) {
		var self = e ? $(e.currentTarget)[this.type](this.getDelegateOptions())
				.data('bs.' + this.type) : this
		self.tip().hasClass('in') ? self.leave(self) : self.enter(self)
	}

	Tooltip.prototype.destroy = function() {
		this.hide().$element.off('.' + this.type).removeData('bs.' + this.type)
	}

	// TOOLTIP PLUGIN DEFINITION
	// =========================

	var old = $.fn.tooltip

	$.fn.tooltip = function(option) {
		return this.each(function() {
			var $this = $(this)
			var data = $this.data('bs.tooltip')
			var options = typeof option == 'object' && option

			if (!data)
				$this.data('bs.tooltip', (data = new Tooltip(this, options)))
			if (typeof option == 'string')
				data[option]()
		})
	}

	$.fn.tooltip.Constructor = Tooltip

	// TOOLTIP NO CONFLICT
	// ===================

	$.fn.tooltip.noConflict = function() {
		$.fn.tooltip = old
		return this
	}

}(window.jQuery);